Amazon’s US sales were probably somewhere in the neighborhood of $6B last year.

$6,000,000,000 * 0.012% = $720,000

That seemingly inconsequential decision is 7 fewer people that would have been laid off.

Granted, most businesses are not large enough to make this sort of minute detail worth testing, or even possible with any statistical significance. But don’t underestimate the value of testing your design hypotheses. It’s possible to be data-driven without sacrificing design innovation.